title: Standardization of the electromyographic signal through the maximum isometric voluntary contraction.
abstract: The objective of this study was to analyze the electromyographic (EMG) data, before and after normalization. One hundred (100) normal subjects (with no signs and symptoms of temporomandibular disorders) participated in this study. A surface EMG of the masticatory muscles was performed. Two different tests were performed: maximum voluntary clench (MVC) on cotton rolls and MVC in intercuspal position. The normalization was done using the mean value of the EMG signal of the first examination. The coefficient of variation CV showed lower values for the standardized data. The standardization was effective in reducing the differences between records from the same subject and in different subjects.
authors.affiliation: Faculty of Odontology of Ribeirão Preto, University of São Paulo, Dept. of Odontology Restoration, Avenida do Café, s/n, Monte Alegre Ribeirão Preto, SP, Brazil. andrebotelho@forp.usp.br
authors.forename: André Luís
authors.initials: AL
authors.lastname: Botelho
authors.forename: Flávio Henrique Umeda
authors.initials: FH
authors.lastname: Gentil
authors.forename: Chiarella
authors.initials: C
authors.lastname: Sforza
authors.forename: Marco Antonio Moreira Rodrigues
authors.initials: MA
authors.lastname: da Silva
mesh_terms: D000293:Adolescent; D000328:Adult; D003768:Dental Occlusion, Centric; D004576:Electromyography / Q000379:methods / Q000592:standards* / Q000706:statistics & numerical data; D005260:Female; D006801:Humans; D007537:Isometric Contraction / Q000502:physiology*; D008297:Male; D008406:Masseter Muscle / Q000502:physiology; D008410:Masticatory Muscles / Q000502:physiology*; D011187:Posture; D012015:Reference Standards; D015203:Reproducibility of Results; D013703:Temporal Muscle / Q000502:physiology; D013997:Time Factors; D055815:Young Adult